Jean Langlais (1907-1991) the celebrated organist and composer gave a 1975 recital in St Albans Cathedral and Abbey Church. Here are two movements - Visions prophétiques & La cinquieme trompette from 'Cinq meditations sur l'Apocalypse' 1973 followed by his Improvisation on a submitted theme. He plays the theme twice before the improvisation begins.
en.wikipedia.o...
He also performed (not on this video)
Chant héroique: Chant de paix (Neuf Pieces)
Arabesque sur les flutes (Suite francaise)
Imploration pour la croyance
Huit chants de Bretagne, Nos 2 and 7
16 авг 2022
